The possible hidden-charm molecular baryons composed of anti-charmed meson and charmed baryon

With the one-boson-exchange model we have studied the possible existence of the very loosely bound hidden-charm molecular baryons composed of anti-charmed meson and charmed baryon. Our numerical results indicate that there exist ${\mathrm{\Sigma }}_c{\bar{D}}^{\ast }$ states with $I(J^P)=1/2(1/2^-), 1/2(3/2^-), 3/2(1/2^-), 3/2(3/2^-)$and$\Sigma_c\bar{D}$statewith$3/2(1/2^-)$\mathrm{.}Butthe$\Lambda_c \bar{D}$and$\Lambda_c \bar{D}^*$ molecular states do not exist.